30280305 has 64 divisors (see below), whose sum is σ = 56401920. Its totient is φ = 13728000.

The previous prime is 30280303. The next prime is 30280333. The reversal of 30280305 is 50308203.

It is not a de Polignac number, because 30280305 - 2¹ = 30280303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30280301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 299755 + ... + 299855.

It is an arithmetic number, because the mean of its divisors is an integer number (881280).

Almost surely, 2^30280305 is an apocalyptic number.

It is an amenable number.

30280305 is a deficient number, since it is larger than the sum of its proper divisors (26121615).

30280305 is a wasteful number, since it uses less digits than its factorization.

30280305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30280305 is about 5502.7543103431. The cubic root of 30280305 is about 311.6879996582.

Adding to 30280305 its reverse (50308203), we get a palindrome (80588508).

The spelling of 30280305 in words is "thirty million, two hundred eighty thousand, three hundred five".